Estuarine retention of larvae: Contrasting effects of behavioral responses to turbulence and waves
Estuarine retention of larvae: Contrasting effects of behavioral responses to turbulence and waves
复制标题
幼虫在河口滞留：对湍流和波浪的行为反应的对比效果
DOI：
10.1002/lno.12052
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发表时间：
2022
影响因子：
4.5
通讯作者：
Wilkin, John L.
中科院分区：
文献类型：
--
作者：
Garwood, Jessica C.;Fuchs, Heidi L.;Gerbi, Gregory P.;Hunter, Elias J.;Chant, Robert J.;Wilkin, John L.
小尺度流体运动的强度在沿海景观中有所不同，这可能会驱动浮游生物幼虫的物种特异性行为适应。例如，入口和河口通常比大陆架有更强的湍流和更弱的表面重力波。在中大西洋湾，东部泥螺（Ilyanassa obsoleta）栖息在海湾和河口，而三线泥螺（Ilyanassa trivittata）栖息在大陆架。这两种蜗牛的幼虫对流体动力信号的反应不同：它们都在平静的条件下悬停，并在涡旋（湍流的信号）下下沉，而只有陆架蜗牛的幼虫在波浪下可能很大的加速度下下沉和上浮。我们通过数值实验研究了这些观察到的幼虫行为和更理想的幼虫行为如何影响河口的滞留和沉降。在特拉华湾和邻近大陆架的区域模型中释放和跟踪了虚拟幼虫。向下运动的行为，包括涡度诱导的行为，有助于将幼虫集中在底部附近，并增强在海湾中的滞留。相比之下，涉及向上运动的行为，包括加速度诱发的行为，促进了出口到货架上。与中性浮力相比，涡度诱导的行为还可以延长在海湾中的停留时间，提高定居概率，缩短上层幼虫持续时间，所有这些都有利于河口物种。这种将幼虫观察与模拟相结合的方法提供了证据，表明对海岸物理的行为反应可以通过增强幼虫在原生海景中的滞留和定居来降低幼虫的死亡率。
The intensity of small‐scale fluid motions varies among coastal seascapes, which could drive species‐specific behavioral adaptations in planktonic larvae. For example, inlets and estuaries typically have stronger turbulence and weaker surface gravity waves than the continental shelf. In the Mid‐Atlantic Bight, eastern mudsnails (Ilyanassa obsoleta) inhabit inlets and estuaries, whereas threeline mudsnails (Ilyanassa trivittata) inhabit the continental shelf. The two species' larvae respond differently to hydrodynamic signals: both hover in calm conditions and sink in response to vorticity, a signal of turbulence, while only shelf snail larvae also sink and swim up in response to accelerations, which can be large under waves. We investigated how these observed larval behaviors and more idealized ones affect retention and settlement in estuaries using numerical experiments. Virtual larvae were released and tracked in a regional model of Delaware Bay and the adjacent shelf. Behaviors that involved downward motions, including vorticity‐induced behaviors, helped concentrate larvae near the bottom and enhanced retention in the bay. In contrast, behaviors that involved upward motions, including acceleration‐induced behaviors, promoted export onto the shelf. Compared to neutral buoyancy, the vorticity‐induced behaviors also conferred longer residence times in the bay, higher settlement probabilities, and shorter pelagic larval durations, all of which would be advantageous to estuarine species. This integration of larval observations with simulations provides evidence that behavioral responses to coastal physics can reduce larval mortality by enhancing retention and settlement in native seascapes.
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影响因子：
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作者：
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DOI：
--
发表时间：
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期刊：
影响因子：
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作者：
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通讯作者：
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影响因子：
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